History - Mega Disasters : Yellowstone EruptionThe world's largest, most active volcano system exists in the western US. 6,000 years ago, the Yellowstone Volcano erupted. Lava and pyroclastic flows covered 3,000 square miles with ash 3 feet thick. Fossils discovered as far away as Nebraska were foundto have died from inhaling the Yellowstone debris. If or perhaps we should say when it erupts again, the Yellowstone "Mega Volcano" will create a global cataclysm beyond human comprehension. Everything